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Thread: xsl param

  1. #1
    Join Date
    May 2009
    Posts
    2

    xsl param

    Hi, I am having difficulty displaying a variable to represent the percentage of students who receive a particular grade.
    Any help would be greatly appreciated my code is as follows:

    XML:
    <student>
    <first-name>Ulne</first-name>
    <last-name>Douglas</last-name>
    <grade>C</grade>
    </student>
    <student>
    <first-name>Ambrose</first-name>
    <last-name>Tyler</last-name>
    <grade>B</grade>
    </student>
    <student>
    <first-name>Roger</first-name>
    <last-name>Clemens</last-name>
    <grade>A</grade>
    </student>
    <student>
    <first-name>Monroe</first-name>
    <last-name>Hamburger</last-name>
    <grade>A</grade>
    </student>
    </class>

    XSL:
    <?xml version="1.0" ?>
    <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="html" version="4.0" />

    <xsl:template name="print_grade">
    <xsl:param name="target_grade" select="''" />
    <xsl:variable name="grade" select="class/student[starts-with(grade,$target_grade)]" />
    <xsl:if test="$target_grade=''" />
    <h1><xsl:value-of select="$target_grade" /></h1>

    <!--
    Number of students receiving grade: <b><xsl:value-of select="count($grade)" /></b>

    Percentage of students receiving grade: <!--I need to print the percentage of students receiving a particular grade variable out of the total students-->
    -->
    </xsl:template>

    <xsl:template match="/">
    <html>
    <head>
    <title>Grade Report</title>
    </head>
    <body>
    <p>
    <xsl:call-template name="print_grade">
    <xsl:with-param name="target_grade" select="'A'"/>
    </xsl:call-template>
    </p>
    <p>
    <xsl:call-template name="print_grade">
    <xsl:with-param name="target_grade" select="'B'"/>
    </xsl:call-template>
    </p>
    <p>
    <xsl:call-template name="print_grade">
    <xsl:with-param name="target_grade" select="'C'"/>
    </xsl:call-template>
    </p>
    </body>
    </html>
    </xsl:template>
    </xsl:stylesheet>
    Last edited by spyro; 05-25-2009 at 05:31 PM.

  2. #2
    Join Date
    Feb 2009
    Posts
    33
    Code:
    <xsl:value-of select="concat(count(class/student[grade = $target_grade]) div count(class/student)  * 100,'%')"/>
    Cheers, John Bampton

  3. #3
    Join Date
    Feb 2009
    Posts
    33
    I would use XSLT 2.0 and do something like the following
    Code:
    <?xml version="1.0" encoding="UTF-8"?>
    <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
          xmlns:xs="http://www.w3.org/2001/XMLSchema"
          exclude-result-prefixes="xs"
          version="2.0">
    	<xsl:template match="/">
    		<html>
    			<head>
    				<title>Grade Report</title>
    			</head>
    			<body>
    				<p>
    					<xsl:for-each-group select="class/student" group-by="grade">
    						<xsl:sort select="grade"></xsl:sort>
    						<xsl:variable name="currentgrade" select="grade"></xsl:variable>
    						<h1>	
    							<xsl:text> number of students receiving grade </xsl:text>
    							<xsl:value-of select="grade"></xsl:value-of>
    							<xsl:text> equals </xsl:text>
    							<xsl:value-of select="count(/class/student[grade = $currentgrade]) "></xsl:value-of>
    							<xsl:text> </xsl:text>
    							<xsl:text>Percentage </xsl:text>
    							<xsl:value-of select="concat(count(/class/student[grade = $currentgrade]) div count(/class/student) * 100,'%')"></xsl:value-of>
    						</h1>	
    						<br/>
    					</xsl:for-each-group>
    				</p>
    			</body>
    		</html>
    	</xsl:template>
    </xsl:stylesheet>
    This automatically picks up the grades without having to hard code them in the xsl in the call template.

    Cheers, John Bampton.

  4. #4
    Join Date
    Feb 2009
    Posts
    33
    Or you cound use XSL 1.0 with the following:

    Code:
    <?xml version="1.0" encoding="UTF-8"?>
    <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    	<xsl:template match="/">
    		<html>
    			<head>
    				<title>Grade Report</title>
    			</head>
    			<body>
    				<p>
    					<xsl:for-each select="class/student[not(grade = preceding::grade)]" >
    						<xsl:sort select="grade"></xsl:sort>
    						<xsl:variable name="currentgrade" select="grade"></xsl:variable>
    						<h1>	
    							<xsl:text> number of students receiving grade </xsl:text>
    							<xsl:value-of select="grade"></xsl:value-of>
    							<xsl:text> equals </xsl:text>
    							<xsl:value-of select="count(/class/student[grade = $currentgrade]) "></xsl:value-of>
    							<xsl:text> </xsl:text>
    							<xsl:text>Percentage </xsl:text>
    							<xsl:value-of select="concat(count(/class/student[grade = $currentgrade]) div count(/class/student) * 100,'%')"></xsl:value-of>
    						</h1>	
    						<br/>
    					</xsl:for-each>
    				</p>
    			</body>
    		</html>
    	</xsl:template>
    </xsl:stylesheet>
    Regards, John Bampton.

  5. #5
    Join Date
    May 2009
    Posts
    2
    Thanks John i have adapted your solution and it works perfectly:

    <xsl:variable name="percent" select="count($grade)" />

    Percentage of students receiving grade:
    <b><xsl:value-of select="number($percent) div count(//grade) * 100" />%</b>

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